Machine for cutting miter and bevel gear-wheels.



I. BUCK.

MACHINE FOR CUTTING MITER AND BEVEL GEAR WHEELS.

APPLICATION FILED FEB. BI I914.

Patented June 15, 1915.

4 SHEETS-SHEET II THE NORRIS PETERS 60.. PHOTO-LITHUI. WASHINGTON. D. C.

.l. BUCK. MACHINE FOR CUTTING MITER AND BEVEL GEAR WHEELS.

APPLICATION FILED FEB. 5. 1914.

Patented June 15, 1915.

4- SHEETSSHEET 2.

THE NORRIS PETERS 6a., PHOTU-LITHQ. WASHINGTON. D. c.

- J. BUCK.

MACHINE FOR CUTTING MITER AND BEVEL GEAR WHEELS.

APPLICATION FILED FEB. 5.1914.

Patented June 15, 1915.

4 SHEETS-SHEET 3.

THE NORRIS PETERS CO.. PHOTC-LITHO.. WASHINGTON. D c.

J. BUCK. MACHINE FOR CUTUNG MITER AND BEVEL GEAR WHEELS. APPLICATION mzn' FEB. 6. 1914.

1,143,498. Patented June 15, 1915.

4 SHEETS-SHEET 4- L 1 Q A? z 52 54 2/ H O O .5 1 l 5/ O 5655? 0 O w0%ze55e f Z7-2ve7z%07" C 7z71/ BZ/CZL 1H5 NORRIS PETERS 60.. PHOTO-LITHQ. WASHINGTON. D. c

7 Lincoln,

FFC.

JOHNIBUCK, OF LINCOLN, ENGLAND.

- MACHINE FOR CUTTING MITER AND BEVEL GEAR-WHEELS.

To all whom it may concern Be it known that I, JOHN BUCK,

a subject of the King,of.Great Britain,

residing at England, have invented certain new and useful Improvements in Machines for Cutting Miter and Bevel Gear-Wheels, of

which the following is a specification. v

This invention relates to that class of ma-'' chine for cutting miter and bevel gear wheels such as is set forth in the specification and drawings of my United States Patent No. 5658340 The object of my invention is to improve certain working parts so that instead of pushing the slides from the back I pull the slides in a direct line from the cutters, thus taking the strain off the slides.

I construct themain driving bracket or pedestal in such a way as to act as astay and support for the slides and their back ing plates, so that when the blank is being excavated or roughed out or divided,the said slides and backing plates will be setcurelyheld to the pedestal, thereby reducing the stress upon the pivot pin. Moreover I so construct the formers for the tracers as toenable them to operate in the simplest and most correct manner without necessitating any recourse to complicated drawings, and I also constructappliances for stopping the machine when the wheel cut. My invention will .be clearly understood from the following description aidedby the annexed drawings incwhich j Figure 1 is an elevation of the improved machine with the pivoted frame removed. Fig. 2 is aflplan of the machine with the swiveled frame applied. Fig. 3 is 'an elevation of the mechanism forreciprocating'the cutters. Fig. 4c isa plan showing a portion of the. driving mechanism. Fig. 5 is a plan 7 of a clamp for securing the curved rod to the frame. Fig. 6 is an elevation ofa portion of the machine showing the mechanism for stopping the machine. Y a

For the purpose of the invention, the. actuating disk 1 for the cutters 2 is placed in front of the cutters, and the crank pint) of the actuating disk 1. is engaged in a vertical slot formed in a sliding block a for reciprocating same. This block 4 is connected to the cutter slides 5, 5 by links 6, 6, so that on a movement of the actuating disk 1 the block 4: will be reciprocatedin its guides 7, 7 and,through the links 6, 6, willreciprocate the said slides ,5, 5, irrespectiveIof the angles Specification of Letters Patent.

Patented June 15, 1915.

Application as Fame 6, 1914. Serial No. 817,030.

at which they are placed. The cutters 2,

during their operation, are, instead of being pushed, patent.

The grooved backing plates 8, 8, carrying therefore, pulled as in my prior the cutter slides 5, 5, are hinged together with one part overlapping the other, the pin 9 securing said plates 8 to the main driving pedestal -10having a very large fiat head 11 embedded in a recess in one plate so as to form a large bearing surface engaging that plate and thereby firmly secure said plates :to thepedestal Without fear of their moving 'sidewise on said pin.

Each backing plate is also provided with a pin 12, carrying a roller which travels in a curved slot 13 in the pedestal, see Fig. 6,

for further insuring a close connection of the backing plates to said pedestal, and each pin 12 is provided with a nut or collar 14: that engages the back of the pedestal but allowsfmovement of the backing plates about their pivot pin 9. a

Each former 14: for the tracers is provided with a slot 15 that conforms in shape and size to each half tooth to be cut, one set of formers being required for each different shapeand size of teeth. These formers are carried by blocks 16 connected to a sliding bracket 17 by a rod 18 which is formed with 'rightand left-hand screw threads and is operable by a handle 19 so as to position the formers 14 with regard to the teeth to be out. In the slots 15 are positioned the tracerswhich are in the form of pins 20 projecting from adjustable pieces 21 secured to the backing plates 8.

The pivoted frame 22 is provided with a clamping device, which is located therebeneath and is designed to engage a rod 23 curved to the same are as the quadrant rack 24 on the bed 25 of the machine. One end of such curved rod-23 is connected to a lever 26 projecting from a horizontal bevel gear I 27xwhich meshes with a vertical bevel gear 28, the; latter carrying a lever 29 which in turn is connected by a rod 80 to a rocking lever 31 or equivalent. The free, upper end of lever 31 is connected by a link 32 to the sliding bracket 17 carrying the formers, the lever. .and linksbeing so constructed as to be a justable in order to vary the extent of movement.

After the connection of rod 23 to frame 22 has been adjusted in accordance with the po- .t 0.n 9f the latter for cutting, the move by causing the tracers 20 to rock the backing plates 8 about their pivot pin 9 and so position the cutters 2 to effect the proper or desired cutting in the blank 33. The movements of the frame 22 and the backing plates 8 are effected while the cutters are not at work, and so soon as the tracers 20 have reached the end of the curved slots 15 in the formers the machine stops.

' To stop the machine, the rocking lever 31, see Fig. 6, is provided with an arm 34 one end of which is slidably engaged with a rod 35, and when the cutters are at the required depth of the teeth, the said end of arm 34 comes in contact with a collar 36 on the rod.

35 and pushes the latter endwise. Said rod is provided with an adjustablenut 37 which is thus pressed against a lever 38 secured to a spindle 39 that is journaled in a bracket 40 on bed. 25. At the other end of the spindle 39 isa pawl 41 which engages the upper arm of a latch 42 which is pivoted to the bracket 40 and carries one end of a chain 43 connected to one arm of a rocking beam 44, the other arm of which is weighted as at 45, said rocking beam controlling the driving belt (not shown). When theteeth are cut to their required depth, the nut 37 on rod 35 presses against and thus rocks lever 38,

thereby releasing latch 42 and chain 43, with the result that the weight 45 rocks beam 44 and brings the belt onto the loose pulley 46.

The main object of this stop motion is to enable the operator to Work two or more machines at the same time. Having set the machine and the timing arm and the rod, he can leave the machine with the assurance that it will stop when the wheel is cut, so

that it does not require watching.

The clamping of the frame 22 to the curved rod 23 may be effected by any known means, but that shown in Fig. 5 consists of a strap 47 encircling the said rod and forming part of a plate 48 secured to theframe, theclamping action being produced by .a screw 49. V

The frame 22 and its operating mechanism, as also the driving gear, are the same as in my previous patent.

'What I do claim as my invention and desire to secure by LettersPatent is 1. In a machine for cutting gear teeth, the combination of a pair of pivotally-connected backing plates, each provided with a cutter slide; a support for said plates; a movable pair of blocks carried by said bracket and provided, each, with a former having therein a 'slot for the reception of the adjacent tracer, said slotsconforming to the slze and shape of the teeth to be cut.

2. In a machine for cutting gear teeth, the combination of a pair of pivotally-connected backing plates, each 'PI'OVldGd with a cutter slide; a support for said plates; amovable member connected to one end of each plate and provided'with a tracer; a bracket-adjustable toward'and from said plates; a rotatably-mounted vertical rod carried by said bracket and provided 7, with" oppositelythreaded portions; a pair of superposed blocks engaged with the threadedportions of said rod; and a former carried by each block and provided with a'slot for the reception of the adjacent tracer, said slots conforming to the size'and shape of the teeth to be cut.

3. In a machinefor cutting gear teeth, the combination, with a pair of backing plates, and a supportto which thesame are superposed blocks; and a former carried by 1 7 each second-named block and having a slot therein for the reception of the adjacent tracer, said slots conforming to the size and shape of the teeth to be cut. 7

4. In a machine for cutting gear teeth, the combination, with a pair of backing-plates, and a support to which the same are hinged at their front ends; of a pair of cutter slides mounted in said plates; an actuating disk arranged in front of said slides and provided with a crank pin; a reciprocatory block having a vertical slot wherein said pin is engaged; a link connection between said blockand the fIOIlhiBIld of each slide; a member movably mounted on the rear end of each plate and provided with a tracer; a

bracket slidable toward and from said plates engaged with the formers of the secondnamed frame; a rod clamped to the firstnamed frame; and connections between said means for said frame; of a former-carrying frame; tracers carried by said element and l engaged with the formers of the secondnamed frame; a rod clamped to the firstnamed frame; a lever system connected with the second-named frame for moving the same toward and from said element; and connections between said rod and said lever system for actuating the latter from said first-named frame.

7 In a machine for cutting gear teeth, the combination, with a cutter-carrying element, a pivotally-mounted frame, and operating means for said frame of a former-carrying frame; tracers carried by said element and engaged with the formers of the. secondnamed frame; a rod clamped to the firstnamed frame; a pair of levers equipped with intermeshing gears one of said levers being operatively connected with said rod; and connections between the other lever and the second-named frame for moving the latter toward and from said element 7 8. In a machine for cutting gear teeth, the combination, with cutting mechanism, operating mechanism therefor, and a movable former carrier associated with saidcutting mechanism; of a stop motion for controlling said operating mechanism embodying a beltshifting fork, a rocker for shifting the same, a latch connected Withsaid rocker and normally holding it in inoperative position, means for releasing said latch at the conclusion of the cutting operation, and means for automatically operating said rocker when such release is effected.

9. In a machine for cutting gear teeth, the combination with a cutter-carrying element, a pivotally-mounted frame, and operating means for said frame, of a former-carrying frame, tracers carried by said element and engaged with the formers of the second.-

Gopies of this patent may be obtained for five cents each, by addressing the named frame, a rod clamped to the firstnamed frame, connections between said rod and the second-named frame for actuating the latter from said element, and stop mechanism actuated by said connections for interrupting the operation of the machine.

10. In a machine for cutting gear teeth, the combination with a cutter-carrying element, a pivotally-mounted frame, and operating means for said frame, of a formercarrying frame, tracers carried by said element and engaged with the formers of the second-named frame, a rod clamped to the first-named frame, a lever system connected with the second-named frame for moving the same toward and from said element, connections between said rod and said lever system for actuating the latter from said first-named frame, and mechanism for automatically terminating the actuation of said operating mechanism at the conclusion of the cutting operation.

11. In a machine for cutting gear teeth, the combination with a cutter-carrying element, a pivotally-mounted frame, and operating means for said frame, of a former- .carrying frame, tracers carried by said element and engaged with the formers of the second-named frame, a rod clamped to the first-named frame, a pair of levers equipped with intermeshing gears, one of said levers being operatively connected with said rod, connections between the other lever and the second-named frame for moving the latter toward and from said element, and mechanism operatively connected to said connections for automatically terminating the actuation of said operating mechanism at the conclusion of the cutting operation.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN BUCK. Witnesses:

' ALBERT E. T. JOURDAIN,

' A. R. AnAMs.

Commissioner of Patents,

Washington, D. 0. 

